ADHD a disorder or a personality

I sometimes just wonder if the school systems are really helping our children by giving them an education or if they are just alienating children from family values and teaching them that the only way to be smart is to learn to read, write, and do math at an average level.
Do we forget that it is our very differences that make a society function? Not everyone can write the descriptions we also need someone to photograph the pictures. Last year in my Practical Logic class I learned about the various types of intelligences. I have two daughters diagnosed with "mental" disorders. My ten year old is diagnosed ADHD, Depressive disorder, and Anxiety Disorder, My almost 7 year old is diagnosed with ADHD, Mood disorder, and "strong symptoms of a phonological reading disorder".
Here's a philosophical view on it: If Dyslexia affects about 10-20% of everyone (this is estimated because only about 5% of people are ever diagnosed with it). Wouldn't having Dyslexia put you in the "elite" section of everyone. Dyslexics OFTEN are highly intelligent when it comes to pictures, and "Spatial" intelligence. As for me, I am very very very NOT spatially intelligent.
People with ADHD don't focus for very long on anything that they don't find fascinating. How is that a bad thing? If it is mudane, boring, or just equally unsatisfying is it worth your time? ADHD people are often messy and unorganized (everyone in my family) yet when something is of utmost importance they are able to do it when necessary. I believe that ADHD represents  people who are highly intelligent in very specific areas that they can do these tasks so easily that they simply don't NEED to focus on it unless they absolutely have to. This also represents a deficit in other areas where people without ADHD excel at.
People with ADHD work great in FAST-PACED jobs where their attention needs to vary from one thing to the next very quickly. They are able to work in these cases because the "CHALLENGE" to be able to do it is a worthy undertaking.
Of course this is all just theory on my part. I think that mental disorders are definitely present in people and similar "symptoms" do attach. However, I believe that they are merely genetic and personality differences that are handed down through families and genes.
Who knows...what do we really know anyway?
I think schools should be able to have a variety of different subjects starting at an early age that children can be tested and placed based on strengths and weaknesses (of course language and maths would be taught to all)